Homeowners are increasingly choosing to add battery storage to their solar power installation. When considering solar battery storage, you will always come down to the question: Should I choose a lead-acid battery or a lithium-ion battery? After all, these are the two most popular home storage batteries available in the market, and here is everything you need to know to make a decision.
Understanding the Characteristics of Each Battery
Lead acid batteries and lithium-ion batteries use different electrochemical processes to store electric charge and produce electrons.
Inside a lead-acid battery, a lead rod is submerged in a sulphuric acid solution. The controlled chemical reaction allows the battery to produce electricity, and the reversal of the reaction recharges it.
The relatively advanced battery uses the movement of lithium in an electrolyte solution. The ions move between an anode and a cathode to produce electricity. The small size of the Lithium-ion allows Li-ion batteries to store high charge per unit mass and deliver high voltage.
Weighing the Pros & Cons
Lithium-ion batteries are proven to have a higher battery capacity than lead-acid batteries. This means that a lithium-ion battery will store more energy than a lead-acid battery of the same size. The battery capacity can vary from one manufacturer to the next for lithium-ion batteries.
Like solar power efficiency, battery efficiency is an important metric to consider when choosing a battery. Most popular lithium-ion batteries like Tesla Powerwall and Enphase offer high efficiency of over 95%. On the other hand, lead-acid batteries only offer 80-85% battery efficiency.
A lead-acid battery is highly economical although there are virtually none available on the market because of how inefficient they are compared to lithium. Lithium-ion batteries can start selling for $10,000, and the price will go up depending on the system size and type of installation you choose. A lead-acid battery delivering similar power costs hundreds, if not thousands, of dollars less, but will power only a fraction of a lithium-ion
As batteries age, they lose efficiency and degrade. Solar batteries charge, discharge, and then recharge. A lithium-ion battery can go through more charge-discharge cycles than lead-acid batteries. Hence, they offer a longer life span. Learn more about the Enphase Encharge battery on our site. Don’t forget to stop by our Plantinum+ page as well for even more great information on how green Power Energy offers industry-leading technology bundled to save.
What’s the Verdict?
Lithium-ion batteries clearly deliver more than lead-acid batteries. They only score below lead-acid batteries in a cost comparison. However, the longer lifespan also offsets the higher initial cost attached to lithium-ion batteries, which keeps them price competitive.
Big brands like Tesla and Enphase make modern lithium-ion batteries that are becoming more efficient, cost-effective, and compact with time. We would be happy to discuss this and more with you, so please don’t hesitate to Contact Green Power Energy today for more information.